#include <armadillo>
#include <sys/time.h>
#include <sys/resource.h>
#include <stdio.h>
#include <fstream>
#include <string>

using namespace std;

using namespace arma;

int main(int argc, char **argv){

  mat A(4,4), B(4,4);

  A.eye();
  B.randn();

  cout << A <<endl;
  A += B;
  cout << B <<endl;
  cout << A <<endl;

  return 0;
}
